<template>
  <div class="cmt-container">
    <h3>发表评论</h3>
    <hr>
    <textarea v-model="msg" placeholder="请输入要评论的内容(最多输入120字)" maxlength="120"></textarea>
    <mt-button type="primary" size="large" @click="postComment">发表评论</mt-button>

    <div class="cmt-list">
      <div class="cmt-item" v-for="(item, i) in comments" :key="item.id">
        <div class="cmt-title">
          第 {{ i+1 }} 楼&nbsp;&nbsp;用户：{{ item.user_name }}&nbsp;&nbsp;发表时间：{{ item.add_time | dateFormat }}
        </div>
        <div class="cmt-body">
          {{ item.content === '' || item.content === 'undefined' ? '此用户很懒，什么都没留下': item.content }}
        </div>
      </div>
    </div> 

    <mt-button type="danger" size="large" plain @click="getMore">加载更多</mt-button>
  </div>
</template>
<script>
import { Toast } from 'mint-ui'
export default {
  data(){
    return{
      pageIndex: 1,
      comments: [],
      msg: ''
    }
  },
  created(){
    this.getComments()
  },
  methods: {
    getComments(){
      this.axios.get('/api/getcomments/'+this.id+'?pageindex='+this.pageIndex)
      .then( response =>{
        // this.comments = response.data.message
        this.comments = this.comments.concat(response.data.message)
        console.log(response)
      })
      .catch( error =>{
        Toast('获取评论失败')
      })
    },
    getMore(){
      this.pageIndex++
      this.getComments()
    },
    postComment(){
      if(this.msg.trim().length === 0){
        return Toast('评论内容不能为空')
      }
      this.axios.post('api/postcomment/'+this.id,{
        content:this.msg.trim()
      })
      .then( response =>{
        console.log(response)
        var cmt = { 
          user_name: '匿名用户',
          content: this.msg.trim(),
          add_time: new Date()
        }
        this.comments.unshift(cmt)
        this.msg = ''
      })
      .catch( error => {
        console.log(error)
        Toast('发表评论失败')
      })
    }
  },
  props: ['id']
}
</script>
<style lang="scss" scoped>
  .cmt-container{
    h3{
      font-size:18px;
    }
    textarea{
      font-size:14px;
      height:85px;
      margin:0;
    }
    .cmt-list{
      margin:5px 0;
      .cmt-item{
        font-size:13px;
        .cmt-title{
          background-color: #ccc;
          line-height:30px;
        }
        .cmt-body{
          line-height:35px;
          text-indent:2em;
        }
      }
    }
  }
</style>
